Pull-socket



D. H IORTH.

` PULL SOCKET.

APPLICATION 111121111111118. 1919.

Patented Nov. 23, 1920.

v 314110141301 1702/251 )70Min 5513 m )'MMM UNITED STATES PATENT '-oFFlcE.

i DAVID HJOBTH', QF BRIDGEPORT, CONNECTICUT.

riJLL-socxn'r.

Application led March 18, 1919. Serial No. 283,385.

To all whom t may comer-rz Be it known that I, DAVID HJoR'rH, -a citizen of the United States, and resident of Bridgeport, in the county of Faireld and State of Connecticut, have* invented certain new and useful Improvements in Pull- Sockets, of which the following is a specification.

MyI invention relates to new and useful improvements in electric switches and more particularly to whatis commonly known as electric pull sockets. A

The purpose of the invention is to simplify and generally improve the mechanism of switches of the above character and to design a switch that may be made up largely of sheet metal parts, and whereby it can be quickly and inexpensively assembled ready for use; to design the socket switch so that each pull of the chain will serve to operate the armature in one direction or the other to alternately make and break the circuit Contact.

The same reference characters will ,be found to indicate like or corresponding parts in the several figures of the accompanying drawings forming a part of this specification, and of which,

Figure 1 shows a vertical sectionaleleva-` tion of my improvedform of electric pull socket switch, takenon line o-a of Fig. 2.

Fig. 2 is a top plan view of Fig. 1; Fig. 3 showsa central vertical cross section taken on line b-b of Fig. 2.

Fig. 4 is a bottom planview of Fig. 3. Fig. 5 is a Jf'urther bottom plan view with screw shell and insulating washer removed. l

Fig. 6 is a detached side View of the switch mechanism as seen from the opposite side ofV 14'ig. 1, the armature being in a different position.

Fig. 7 is a further side view similar to Fig. 6 except that the armature, operating slide and pawl, are in a forward position.

Fig. 8 is a sectional elevation of the housing illustrating one of the two positions the pawl assumes when the slide is returning to its normal position, and

Fig. 9 is a detached opposite side view of the slide and pawl shown in Figs. 6 and 7.

Referring in detail to the characters of reference marked upon the drawings, 12 represents the insulative block having a pocket 13 therein which is o en upon two sides and the bottom to recelve the switch' mechanism. It is further provided with recesses 14 and 15 to receive the binding posts,

and also. has several holes to' accommodate I screws for holding the parts in position as will later be more fully explained. An insulatmg washer 16 is fitted to the under side of t-hev porcelain and the threaded shell lportion disposed centrally of the holder for engagement with a lamp, not shown.

The side flanges 19 of the holder are fastened to the porcelain block by means of screws 20and 21 both of which extend up in the porcelain block to engage and sup-l port the screw shell and washer which insulates the shellfrom the terminal members. The `screw 21 which engages one of the flanges 'of the shell extends through the lblock and into the binding post 22 to support the same in therecess 14..

The yieldable terminal 23 which is formed integral with the contact 18 is secured to the block by the screw 20. This terminal,

together with the corresponding yieldable' terminal 24, forms a socket between which the armature 25 is positioned to form the circuit through the lamp. The terminal 24 is connected to the member 26 by a screw 27 which secures the two to the porcelain. The upper end of this member 26 is positioned in the recess 15 and'is provided with a binding screw 28 which serves for the attachment of one of the line wires, not shown. So much of the construction already described is not materially diiferent from the construction of switches now in use.` T he novelty of the device, as will be noted from the further description, resides more particularly in the switch mechanism proper .whereby the armature is quickly thrown in and out of engagement with the socket formed between the terminals.

This switch mechanism is formed, for the most part, of sheet metal and consists of four pieces, aside from the several pivotal studs, spring and armature and, as will be seen, comprises a housing 29 having an upper and lower iange 30, each of which have their edges disposed toward and in alinement with each other to form runways upon which the ways 31 of the slide 32 operate. Screws 33 positioned in the top of the porcelain block serve to engage the top flange 30 in a manner to support and hold the housing up tightly against the top wall of the pocket of the block ina way to properly' position the mechanism therein.

The armature is pivotally mounted upon a stud 34 that is secured to the back of the housing. A spring 35 serves to throw the armature in and out of contact with the terminals for the urpose of operating the switch. This spring is positioned upon a guide pin 36, the inner end of which is pivotedly connected to a stud 37 on a rocker member 38 while the other end is slidably supported in a hole of an ear 39 formed upon theend of the armature. One end of the spring is positioned against this ear and the other against the stud 37 so as to throw the free end ofthe armature from one position-to another, as the rocker member is rocked and its stud. 37 carried past the center. The amount of throw of the armature is limited by the stops 40 secured to the housing and against which the short end of the armature strikes when operated.

The rocker member 38 is pivoted upon the inside of thev housing and between the upper` and lower anges, and aside from the resist-v ance of the spring 35 is free to be'turned from the position shown in Fig. 6 to that shown in Figs. 7 and 8 by the action of the slide 32 and through the engagement of a pawl 41 mounted on a pin 42 carried by the slide. This rocker member carries two pins 43 and`44 upon the opposite end portions of its near side as shown in Figs. 6 and 8which are alternately engaged by the sockets 45 in the forward edge of the pawl 41, and whereby the rocker member is moved from one position to another. The slide is normally held in its retracted position as shown in Fig. 6 by means of a spring 46 secured to a pin 47 upon the housing and whose free end engages the pin 43 mounted in the slide. The pull chain 48u is guided through a sleeve 49 secured to the side of` the porcelain block and positioned in front of the slide. This chainis made'fast to the lu 50 formed upon the free end of the paw so that the pawl' and slide may be drawn forward in line with the movement of the slide through the connection of the chain and pawl against the action of the spring 46. The line of draft of the chain is central, being guided l by the sleeve 49, yet the pawl lbeing pivotedly connected with the slide, is free toI swin slightly upon its pivot'when engaging t e near pin 44, see Fig. 6, upon the rocker member so that when the rocker member Hops around its other pin 42 will engage the top edge of the other side of the arranged entirel pawl leaving the pawl freeto move back, see- Iiig. 8, past the pin 43 when the slide returns to its normal position. The rocker member is thus positioned so that with the next forward movement of the slide and pawl the other pin 43' will be engaged by the socket to throw the rocker member against its spring connection with'the armature.

From the foregoing it will be seen that with each pull of the chain the slide and connected mechanism will be operated to either open or close the switch and that with each complete pullI of the chain the slide and pawl return to their normal position and in readiness for a further operation. 7

Having thus described my invention, what I claim and desire to secure by Letters Patent, is J l. In an electric pull socket block switch, the combination of an insulative block formed with a pocket, a housing fixed within said pocket and having inwardly projecting flanges forming runways, a stud proj ecting outwardly from said housing, an armature pivotally mounted upon said stud and adapted to open and close a circuit, a rocker member pivotally mounted within the housing, a guide pin pivotally connected at one end tosaid rocker member and slidingly supported at its op osite end by said armature, aspring carrie by said guide pin and engagin said rocker member and armature, a slide member engaginggsaid runways, a pawl carried by said slide member and adapted to engage the rocker member, and a pull chain connected to said awl.

2. In an electric pull socket bloc4 switch, the combination of an insulative block formed with a pocket, a housing arranged within said pocket and having parallel runways, an armature pivotally mounted and outside the housing for opening and closlng avcircuit, a rocker member arranged within the housing and having pins projecting therefrom, a guide pin ivotally engaging the rocker member and s idably engaging said armature, a spring mounted on said guide pin and engaging said armature and'rocker member, a reciprocating slide member traveling on said runways, a pawl arranged between the slide member and the housing and-carried by the said slide member for en agement with the pins on said rocker mem `r, means for retaining said slide member in normal position and a pull chain connected to said paw 3. In an electric pull socket block switch, the combination of an insulative block formed with a ocket, a housing arranged within said poc et and having upper vand lower alined anges forming runways, a stud projecting outwardly rom said housing, an armature pivotally mounted on said stud and having an inwardly projecting ear formed with an opening2 a rocker member pivotally mounted within the housing, a guide pin pivotally carried by said rocker member and projecting through the ear of said armature, a spring carried by the said guide pin and'engaging said rocker member and ear, a slide member formed with grooves for engagement `With said runways, a pawl` 10 carried by said slide member and adapted for engagement with said rocker member, and a pull chain engaging said pawl.

Signed at Bridgeport in the county of Fairfield and State of Connecticut this 14th day of March, A. D. 1919.

DAVID HJ ORTH.

Witnesses:

C. M. NEWMAN, LILLIAN M. ALLING. 

